Finding the Fourth Proportional to 78,724.29, 108,638.82 and 42,914.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,724.29 : 108,638.82 = 42,914.28 : x
2. Step 2: Convert to fraction form
   78,724.29/108,638.82 = 42,914.28/x
3. Step 3: Cross multiply
   78,724.29x = 108,638.82 × 42,914.28
4. Step 4: Simplify right side
   78,724.29x = 4,662,156,740.35
5. Step 5: Solve for x
   x = 4,662,156,740.35/78,724.29
6. Step 6: Final answer
   x = 59,221.32